Lifetimes of lowest even-parity quartet levels of three-electron ions

Tr�bert, E.

doi:10.1007/bf01411943

Cited by 9 publications

(1 citation statement)

References 26 publications

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“…The higher-multipole order X-ray transition rates scale the steepest with Z and, thus, they dominate at high Z. Atomic lifetime measurements along the isoelectronic sequence can track the individual contributions to the total decay rate [20,21]. The measurements are most easily done on the UV decay branch because, there, the spectral resolution is good enough to resolve decays of individual fine structure levels [22][23][24].…”

Section: Satellites To Diagram Lines In He-like Ion Spectramentioning

confidence: 99%

The Allure of High Total Angular Momentum Levels in Multiply-Excited Ions

Träbert

2019

Atoms

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In the interaction of fast ions with dense matter, the collision frequency is high enough to facilitate the simultaneous excitation of several electrons. Such multiply-excited few-electron systems have been exploited variously for plasma diagnostics. Beam-foil spectroscopic techniques, benefiting from the inherent time-resolution offered by the geometry of typical experiments, have proven particularly fruitful for the study of emission patterns and level lifetimes of specific multiply-excited levels, especially those of maximum spin and total angular momentum. Typical cases are recalled to illustrate some general principles. Among many others, earlier beam-foil measurements have targeted the core-excited 2p53s3p 4D7/2 – 2p5 3s3d 4F9/2 transition in several Na-like spectra ranging from S VI to Cu XIX. Data on the six intermediate elements missing at that time are now added. The interest in such atomic systems with multiple excitations and high total angular momentum values is discussed with a variety of examples.

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Section: Satellites To Diagram Lines In He-like Ion Spectramentioning

confidence: 99%

The Allure of High Total Angular Momentum Levels in Multiply-Excited Ions

Träbert

2019

Atoms

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Study of 3d – 4f and 3d – 5f quartet and doublet transitions of doubly excited three-electron ions

Blanke

Fricke

Heinemann

et al. 1989

Z Phys D - Atoms, Molecules and Clusters

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We present the first observation of optical transitions between doubly excited doublet states in the term systems N V, O VI and F VII. The spectra were produced by foil excitation of fast ion beams. The assignment of the spectral lines was made by comparison with the results of MCDF calculations along the isoelectronic sequence. The same method also led to the identification of two 3 d -4 f quartet transitions in Mg X.

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Radiative and Auger decay channels in K-Shell excited Li-like ions (Z = 6–8)

Mack¹,

Niehaus²

1987

Nuclear Instruments and Methods in Physics Research Section B:

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Different decay modes for doubly excited Li-like ions (ls21n'l') produced in slow (E,,,,, c 5 keV/amu) collisions of multiply charged ions with two-electron targets (He,H,) are discussed. Using the typical differences in the decay of quartet and doublet states we can prove that the spin of the captured electrons is not changed in the collision. It is shown, that the quartet states 1~2~3s. ls2s3d actually do not autoionise (i.e. the fluorescence yield exceeds 0.95) and there is strong experimental evidence that this should hold as well as for the maIority of the other ls2ln'/'-quartet states with n' > 2. The radiative quartet decay feeds 1~2~21' quartet states; cascades leading to 1~2~21' doublet states are discussed as well.

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Lifetimes of lowest even-parity quartet levels of three-electron ions

Cited by 9 publications

References 26 publications

The Allure of High Total Angular Momentum Levels in Multiply-Excited Ions

The Allure of High Total Angular Momentum Levels in Multiply-Excited Ions

Study of 3d – 4f and 3d – 5f quartet and doublet transitions of doubly excited three-electron ions

Radiative and Auger decay channels in K-Shell excited Li-like ions (Z = 6–8)

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